Everybody is worried about Greenland.
The best way to avoid a lot of problems is for the US and Danish armed forces to declare some form of whiskey war.
US Special forces, seal team 6 or something, land in a remote part of Greenland, hoist a giant US flag, declare victory and go home after a few weeks.
3 days later, Danish special forces land in the same spot, take down the US flag and raise an enormous Danish flag, declare victory and go home after a few weeks.
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